London’s FTSE 100 was in positive territory early on Wednesday, with optimism around the potential Covid-19 vaccine breakthrough continuing to buoy global markets. The blue chip benchmark improved 0.31% to 6,316.62, while the FTSE 250 rose 0.02% to 19,032. BAE SEES BIDEN BOOST Aerospace and defence contractor BAE Systems (BA.) added 1.4% to trade at 470p after it maintained its full ...